VISA Serial read error

[wasa1]

I´m trying to read data from my OHM60 Heratherm oven with a RS-232 cable and Visa Test Panel /Visa interactive control. 

I´ve followed the OHM60 document and enter the wanted parameters:

— 57600 bits per second
— 8 data bits
— 1 stop bit
— No Parity

Also entered the given commands from the document, (?:3010:00::c2) in order to read the temperature. But when sending Read/Query i get this error:

"Read Operation
Error

VISA: (Hex 0xBFFF0015) Timeout expired before operation completed."

I´ve looked around this forum and googled for many hours but can´t find a solution.

Please help.

/D

[Albert.Geven]

Did you finish with a crlf or other endcharacter specified in the manual?

[crossrulz]

My first thought is that you need to add a Line Feed to your command in order for the instrument to know the message is complete.

Otherwise, I recommend you post your code and we may be able to spot something that is wrong.

[wasa1]

Thanks for the fast response!
I did not really write any code just wrote the simple command line as in the picture attached. What kind of Line Feed should I add ?

Sorry if I am a big ignorant, I am quit new to this. Thanks in advance.

I attached the page from the manual with the command syntax and so.

/D

[wasa1]

Thanks for the fast respons!

No I do not think so, in the  Visa Test Panel I filled in the parameters and pressed the "Input/Output" tap, then enter my command which is the ?:3010:00::c2 as I mentioned and then pressed Query and/or Read. Which gave the error.

See picture "Visa test panel.png"

/D

[Minions]

Look at the manual on page 5-13.  Try adding the <CR> character to the end of your query.  It should work with the first line.  If not, try the other.

?:3010:00::c2\r
?:3010:00::c2\n

[wasa1]

I have tried "?:3010:00::c2<CR>" but not the /r and /n, I will try it and respond when I can. Thanks!

/D

[crossrulz]

---

@wasa1 wrote:

I have tried "?:3010:00::c2<CR>" but not the /r and /n, I will try it and respond when I can. Thanks!

/D

---

The "\n" when in "\ Codes" display represents a <CR><LF>.  Likewise, "\r" will represent a <CR>.  If you are in a normal/ASCII only display, this will not work for you.

[wasa1]

Sorry but when trying to use \r and \n as you mentioned it does not work. Any ideas?

See attached picture: Visa test panel1.PNG

/D

[Minions]

Just to make sure, you are pressing the QUERY button and not the WRITE button?